Process for the preparation of hydroxybenzylphosphonates

Details Process for the preparation of hydroxybenzylphosphonates Process for the preparation of hydroxybenzylphosphonates

1990-11-21

1992-10-20

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

558104, C07F 940

Patent

active

051571412

ABSTRACT:
A process for the preparation of compounds of the general formula I ##STR1## in which R.sub.1 is hydrogen or methyl, R.sub.2 and R.sub.3 independently of one another are C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.8 cycloalkyl, phenyl, C.sub.7 -C.sub.9 phenylalkyl or halogen, R.sub.2 is additionally hydrogen and R.sub.7 and R.sub.8 independently of one another are C.sub.1 -C.sub.18 alkyl, phenyl or C.sub.7 -C.sub.18 alkylphenyl, which comprises reacting a phenol of the formula II ##STR2## in which R.sub.1 to R.sub.3 have the meaning described above, with formaldehyde or paraformaldehyde, an amine of the formula III

REFERENCES:
patent: 3006945 (1961-10-01), Goddard et al.
patent: 3268630 (1966-08-01), Spivack
patent: 3281505 (1966-10-01), Spivack
patent: 3787540 (1974-01-01), Schmidt et al.
patent: 3790648 (1974-02-01), Schmidt et al.
patent: 4220760 (1980-09-01), Erckel et al.
Chem. Abstract vol. 97:39143b (1982).

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